Radio-frequency coil selection for MR imaging of the carotid vessel wall

9th National Seminar on Medical Physics

物理学;医药卫生

Isa, S. Mat^1 ; Shuaib, I.L.^1 ; Bauk, S.^2

Oncology and Radiological Science Cluster, Advanced Medical and Dental Institute, Universiti Sain Malaysia, Bertam, Penang

13200, Malaysia^1

Physics Section, School of Distance Educations, USM, Penang, Malaysia^2

关键词: Arterial wall;    Cross-sectional study;    Higher resolution;    Mean intensity;    Qualitative images;    Quality ratings;    Radio frequency coils;    Region of interest;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/546/1/012004/pdf
DOI  :  10.1088/1742-6596/546/1/012004

学科分类：卫生学

来源: IOP

【 摘 要 】

This aim of this study was to identify the radiofrequency coil that will produce optimum image quality for scanning the carotid vessel wall using magnetic resonance imaging. A comparative cross-sectional study was conducted using 10 volunteers. Each volunteer was scanned three times using a 1.5T Signa HDxt machine equipped with one of three different coils: a neurovascular array (NV) coil, an 8-channel CTL spine array coil, and a 3-inch surface coil. A qualitative image quality rating was assigned to each image. The images were also evaluated by measuring the signal to noise ratio (SNR) using Osirix 4.2.3 software. The noise was estimated from the mean intensities of the region of interest in the background of the images and the signal was measured in the muscle adjacent to the vessel wall. The SNRs of the three coils were compared using one-way ANOVA, with 104 images used for the data analysis. The mean image quality scores for the NV head coil, CTL coil, and 3-inch coil were 3.4, 3.33, and 1.67, respectively. In addition, the SNRs differed significantly (p